Diffuser



FIG. 1 is a front, top and right perspective view of diffuser showing claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a back, top and left perspective view thereof;

FIG. 9 is a back, top and left perspective exploded view thereof; and,

FIG. 10 a front, top and right perspective view thereof in use.

The broken lines depict environment and form no part of the claimed design. 

CLAIM The ornamental design for a diffuser, as shown and described. 